[verb pree-fawrm; noun pree-fawrm]
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verb (used with object)
  1. to form beforehand.
  2. to determine or decide beforehand: to preform an opinion.
  3. to shape or fashion beforehand: to preform a mold.
  1. biscuit1(def 5).
  2. any of various uncompleted objects of manufacture after preliminary shaping.

Origin of preform

From the Latin word praefōrmāre, dating back to 1595–1605. See pre-, form
Related formsnon·pre·formed, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018